Commonly specifications for square tubes

Square and Rectangular Tubes, a term for square rectangular tube, which are steel tubes with equal and unequal side lengths. It is a strip of steel rolled after a process. Generally, the strip steel is unwrapped, flattened, curled, welded to form a round tube, and then rolled from the round tube into a square tube and then cut to the required length.The steel pipe with equal side lengths is called square pipe, code F. The steel pipe with unequal side lengths is called square pipe, code J.

Square tube according to the production process: hot-rolled seamless square tube, cold-drawn seamless square tube, extruded seamless square tube, welded square tube.

According to the material: plain carbon steel square tube, low alloy square tube

1, plain carbon steel is divided into: Q195, Q215, Q235, SS400, 20 # steel, 45 # steel and so on.

2, low alloy steel is divided into: Q355, 16Mn, Q390, ST52-3 and so on.

Commonly used materials: Q195-215; Q235B

Implementation standards:

GB/T6728-2017,GB/T6725-2017, GB/T3094-2012 ,JG/T 178-2005,GB/T3094-2012 ,GB/T6728-2017, GB/T34201-2017

Application scope: Widely used in machinery manufacturing, construction, metallurgical industry, agricultural vehicles, agricultural greenhouses, automotive industry, railroads, highway guardrails, container skeletons, furniture, decoration, and steel structure fields.